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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Not a valid Sudoku answer. Each 3x3 section has to have the digits 1-9.
Top left 3x3 section should contain 1-9:
5, 3, 1
6, 2, 3
1, 9, 1
It contains 1 three times, 3 twice, and it's missing 4, 7, and 8.
Top middle contains 7 twice and misses 8; top right misses 1 and 3 and has 4 and 8 twice; etc.